Fig. 45. Low power light micrograph of a stage 3 embryo in vitro in the partial phase of hatching, post insemination day 6 (original magnification x400). The blastocyst has hatched halfway. Notice the flattened trophoblast (T) and the plump zona breaker cells (ZBC) at the hatching point.
BC, blastocystic cavity; HP, hatching point; TV, trophoblast vesicle; ZP, zona pellucida.
(From: Sathananthan, Menzes, and Gunasheela, 2003. Printed from Reproductive Biomedicine Online.)
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